LANGMUIR
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2026
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IF 4.4
Xin Wang,Wei-Qian Tang,Xinyu Zhao,Shuo Dong,Yu-Hui Luo,Qing-Hua Wang
This study successfully constructed a direct Z-scheme TP-WO3 heterojunction photocatalytic system via an in situ compositing strategy for the photoassisted Fenton degradation of tetracycline hydrochloride in aqueous environments. The composite formed an intimate interfacial contact between TP and WO3, effectively facilitating the separation and migration of photogenerated charge carriers. Experiments demonstrated that TP-WO3(0.7) achieved a degradation efficiency of 92.34% for 10 ppm tetracycline within 75 min under visible light irradiation with H2O2 assistance, with a reaction rate constant (2.731 × 10–2 min–1) significantly higher than those of the individual components. Radical trapping experiments and electron paramagnetic resonance (EPR) analysis confirmed that h+, •OH, and •O2– were the main active species. This study provides a feasible design strategy and experimental basis for developing efficient and stable organic–inorganic Z-scheme heterojunction photocatalytic materials.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yi Xu,Yurun Zhao,Fukun Liu,Yusheng Que,Jixuan Wei
A sequential IPN strategy decouples pore connectivity from mechanical resilience. • Rigid PBOZ nodes enable extraordinary cyclic resilience at 80% strain. • Robust superhydrophobic aerogels achieve ultrafast oily emulsion separation Polymer aerogels for oil-water separation often need to combine high pore interconnectivity with stable elastic recovery under cyclic compression, yet these requirements are rarely compatible in conventional polyimide (PI) networks. A room−/high-temperature sequential interpenetrating polymer network (IPN) strategy is introduced to decouple pore formation from mechanical locking. Poly(hexahydrotriazine) (PHT) forms in situ at room temperature, acting as a flexible bridging network that disrupts PI lamellar stacking and induces three-dimensional pore interconnectivity. Subsequent high-temperature curing of benzoxazine (BOZ) generates rigid polybenzoxazine (PBOZ) nodes that stabilize stress distribution and enhance elastic recovery without sealing pore throats. Pure PI aerogels exhibit poor connectivity and limited resilience, while PI/PBOZ/PHT aerogels show hierarchical interconnected pores (3–15 μm) with reduced shrinkage. Mechanistically, PHT promotes interfacial coupling and suppresses interlayer slippage, while PBOZ nodes on pore walls dominate elastic recovery and mechanical stability. The optimized aerogel exhibits superhydrophobicity (water contact angle 159.1°), oil uptake of 36–70 g/g, emulsion flux up to 6971 L m −2 h −1 (>98% efficiency), only 3% stress decay after 30 cycles at 80% strain, low thermal conductivity (0.0333 W m −1 K −1 ), and high char yield (42% at 800 °C). These results demonstrate that stage-specific network formation allows for the decoupling of pore connectivity and mechanical resilience, leading to enhanced transport and mechanical properties without trade-offs. Download: Download high-res image (167KB) Download: Download full-size image
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Xun Wang,Min Xu,Yin Qiao,Lirong Yang,Zesheng Song,Lei Xiong
High-performance ultrafiltration (UF) membranes as the essential supporting layer are required to meet the increasing demand for water treatment, while membrane fouling, especially irreversible pollution caused by water flux reduction and poor rejection rate, limits membrane effectiveness and lifespan. A novel piperidine-based diamine monomer (PIP-DA) was successfully synthesized to provide a reactive tertiary amine site and subsequently copolymerized with 4,4′-oxydianiline (ODA) and 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), followed by quaternization with 1,3-propanesultone, to fabricate a series of intrinsic zwitterionic sulfobetaine polyimide copolymers (ZPIP-CoPI-x) with varying zwitterionic contents. The zwitterionic polyimide copolymer UF membranes were prepared via traditional and convenient non-solvent induced phase separation (NIPS). The incorporated zwitterions drastically enhanced the ZPIP-CoPI-0.4 UF membranes surface hydrophilicity as evidenced by a remarkably low water contact angle of 48° and a high water absorption rate of 91.28%, and achieved an outstanding balance between permeability and selectivity with a high pure water flux of 276 L/m 2 ·h and an exceptional bovine serum albumin (BSA) rejection rate of 98.2% at 0.10 MPa. Compared to non-zwitterionized ODA-6FDA, all ZPIP-CoPI-x UF membranes demonstrated excellent comprehensive antifouling performance, including dramatic reduction in BSA adsorption, high flux recovery ratios (FRR >90% over three cycles), and minimized irreversible fouling, attributable to the formation of a stable hydration layer and electrostatic repulsion. Furthermore, the membranes exhibited good antibacterial adhesion properties against both E. coli and S. aureus , along with excellent long-term operational stability, reusability, and chemical resistance across a broad pH range, presenting a promising solution for water treatment applications.
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高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Xueyi Yu,Kaijin Chen,Yanwei He,Siwei Liu,Zhengping Qiao,Yi Zhang
To address warping and heat issues in miniaturized electronics, polyimide (PI) films require enhanced dimensional stability and thermal conductivity. Traditional inorganic fillers often compromise other properties, while multi-filler systems face interfacial challenges. Here, a novel multifunctional negative thermal expansion (NTE) inorganic nanoparticle Hf 2 (WO 4 )(PO 4 ) 2 (HWP) with high thermal conductivity is successfully prepared. Surface modification of HWP particles has been conducted using silane coupling agents with six various functional groups. The coefficient of thermal expansion (CTE) results show that the KH-550 modified HWP has the best interfacial compatibility after adding to the PI matrix. When the addition amount reaches 60 vt%, the CTE drops to 20.4 ppm/K, which is close to that of copper. Benefiting from the good comprehensive performance of 550-mHWP, 550/PI-25 film exhibits a low CTE of 27.8 ppm/K, excellent flexibility, a thermal conductivity of 0.896 W/m·K, while hardly damaging its dielectric properties. The 550-mHWP/PI composite film successfully addresses the long-standing challenge in microelectronic systems where achieving simultaneous control over low thermal expansion coefficient, exceptional flexibility, superior thermal conductivity, and reduced dielectric properties has been problematic. This breakthrough material system presents a viable pathway for advancing intelligent microelectronics development.
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Yuhang Zhuang,Meixin Chen,Zehang Du,Shiying Chen,Kailai Xia,Liuyan Li,Ronglong Ye,Xiaolin Lyu,Zhixing Lu,Mingmao Wu
Polyimide (PI) has attracted significant attention due to its outstanding comprehensive properties. However, its rigid molecular structure and chemical inertness pose challenges for the effective reuse of waste PI, causing environmental concerns and resource depletion. In this work, we present an acid-assisted sulfonation approach to efficiently reuse waste PI materials. The sulfonated PI (SPI) dispersion produced by this method can be readily processed with water-soluble polymers. For example, the fabricated SPI/sodium alginate composite fibers demonstrate impressive tensile strength (162 MPa) and thermal insulation properties. Furthermore, the resulting SPI/reduced graphene oxide aerogels exhibit a unique combination of high fatigue resistance, low thermal conductivity (0.0276 W m −1 K −1 ) and excellent sensing performance. These findings confirm that this method offers an effective route for repurposing waste PI into value-added products that meet the needs of different specific application scenarios, contributing to sustainable economic development.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.9
Jinhuan Li,Mengqi Huang,Kai Yao,Xin Sun,Junxiang Xu,Hongfang Ma,Fengjin Gao,Xuan Yang
To improve the multi-scenario adaptability of electromagnetic wave (EMW) absorbing materials, developing high performance and multifunction integrated absorbers is challenging. Herein, three-dimensional (3D) ultralight aerogels are prepared through a one-pot induced assembly (OIA) approach from graphene/polyimide (PI) precursors and Fe 3 O 4 nanospheres (M-GPIs) and M-GPIs cooperated with Kevlar nano-fibers (ANFs) (M-GPIAs), respectively. The highly effective 3D dielectric/magnetic coupling network structure is formed and leads to a superior electromagnetic wave (EMW) absorption performance. An enormous mechanical improvement is also realized due to the high-performance polymer (PI and ANFs) cooperation, achieving structure-function dually enhancement. The absorption intensity of -77.96 dB and the ultrawide absorption bandwidth of 7.64 GHz are achieved for M-GPIs at a low functional-gradient filling ratio of 8 wt%. Comparable electromagnetic wave absorption properties and even more prominent comprehensive properties are accomplished for M-GPIAs. Mechanism analyses verify that highly dispersed 3D interconnected network structure, multiple heterogeneous interfaces and dielectric/magnetic coupling exert the synergistic effect on EMW absorption performance. The present aerogels also exhibit excellent thermal resistance, thermal insulation, nonflammability and organic-liquid selective absorption properties, which qualify them as stable and durable EMW absorption materials working at unpredictable environments such as those with extremely hot and cold transitions and the risk of fire attack and organic pollutant treat.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Xianzhe Sheng,Shuhuan Yun,Zhenyu Xiong,Weiran Tang,Qianlan Chi,Qingze Dong,Zhonglei Ma,Jianbin Qin,Guangcheng Zhang
Lightweight and high-performance polyimide rigid foams (PIRFs), exhibiting outstanding heat resistance and mechanical properties, as well as excellent flame retardancy, are increasingly required for specialized load-bearing applications. However, commercially available polyimide (PI) foams, which are mostly flexible and low-density, are thermally and mechanically inadequate for high load-bearing purposes. Herein, a scalable and high-efficiency “kill two birds with one stone” cocross-linking and foaming strategy is developed for the fabrication of highly heat-resistant, mechanically strong, and flame-retardant cocross-linked polyimide rigid foams (PIRFs) using the norbornene-end-capped cross-linkable blowing agent (NE-CBA) as both cross-linking agent and blowing agent. Benefiting from the simultaneous construction of high-density cocrosslinked networks and tailorable closed-cell structures via the reaction of maleic anhydride-end-capped PI oligomer (ME-PIO) and NE-CBA, the resultant cocrosslinked PIRFs exhibit exceptional heat resistance, with an ultrahigh glass transition temperature (Tg) of 410.6 °C and a remarkable thermal degradation temperature (Td) of 500.3 °C. Moreover, they possess outstanding mechanical properties, with a high compressive strength of 1.9 MPa at room temperature and 1.7 MPa at as high as 200 °C, with a low mass density of 157 kg/m3. In addition, the PIRFs exhibit excellent thermal insulation properties, with low thermal conductivities (λ) of 0.041 W/(m·K) at room temperature and 0.057 W/(m·K) even at 200 °C, as well as desirable flame retardancy with a high limiting oxygen index (LOI) exceeding 40%. Owing to the dual functionality of the NE-CBA employed in this strategy and the resulting synergistic effect, the PIRFs achieve the Tg > 410 °C and compressive strength exceeding 1.9 MPa at a foam density of 157 kg/m3. This represents the successful simultaneous achievement of low density, ultrahigh heat resistance, and high mechanical strength. The highly heat-resistant and mechanically strong cocross-linked PIRFs, with superior thermal insulation and flame-retardant performance, show significant potential in fields such as aerospace engineering, shipbuilding, railway transportation, and other specialized high-temperature applications.
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高影响因子
LANGMUIR
·
2023
·
IF 3.9
Liang Yuan,Jian Chen,Yuxin Li,Guangzeng Luo,Zhilu Gao,Chunhua Zhou,Hui Li,Peiming Xu,Chuanyong Zong
Stimulus-sensitive materials are of great fascination in surface and interface science owing to their dynamically tunable surface properties and/or morphologies. Herein, we have synthesized an azobenzene-containing polyimide (azo-PI) with enhanced chain flexibility for the fabrication of photosensitive surface patterns on a film/substrate wrinkle system or wrinkle-free devices. The phototriggered cis–trans isomerization kinetics of azobenzene groups in the novel azo-PI with various chain structures were systematically investigated. On the basis of the characteristics of stress relaxation that azobenzene reversible cis–trans isomerization induces in the wrinkled azo-PI film/substrate system, a variety of rewritable visual surface patterns with high resolution and a long legibility time (>30 days) could be easily constructed via visible-light irradiation, enabling the wrinkled azo-PI surfaces to be used as rewritable information storage media. Meanwhile, because of the visible-light irradiation strategy, these photoresponsive surfaces could find potential application in the fabrication of wrinkle-free flexible devices. This study not only sheds light on the influence of the azo-polymer chain structure on its photoresponsive behavior but also provides a versatile strategy for realizing tailor-made smart surface patterns on multilayer functional devices.
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PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Renke Li,Zhiyu Liu,Rong Chen,Shaoyun Guo
Due to the ultralow surface energy of polytetrafluoroethylene (PTFE), PTFE composites usually exhibit poor interfacial interaction and mechanical performances. Herein, a water-soluble precursor of polyimide (PI) was added into the PTFE aqueous emulsion, and well-distributed PI microphase was in-situ constructed in PTFE matrix through the thermal imidization of the precursor during the sintering process of PTFE. The well-distributed PI microphase resulted in significant improvements in the tensile strength , stiffness, and creep-resistance of PTFE. Compared with pure PTFE, the tensile strength and Young’s modulus of PTFE/PI (5 wt%) film increased by 28.1% and 122.3%, and the creep strain decreased by 42.4%. Meanwhile, the film maintained high elongation at break (308.4%), low dielectric constant and loss (2.09 and 0.0014 @10 GHz), exhibiting great potential in the field of high-frequency communication.
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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 24
·12885-12895
·
IF 11.9
Erli Qu,Geng Cheng,Min Xiao,Dongmei Han,Sheng Huang,Zhiheng Huang,Wei Liu,Shuanjin Wang,Yuezhong Meng
A novel acid-base composite membrane consisting of acidic carboxyl-containing polyimide (PI-COOH) and basic polybenzimidazole (OPBI) was fabricated and employed as a high-temperature proton exchange membrane (HT-PEM). PI-COOH was used to prepare HT-PEMs for the first time. The PBI-based acid-base composite membranes and ordinary composite membranes were investigated to elucidate the correlation between the polymer structure and membrane properties, especially in situations where phosphoric acid (PA) is used. The results show that OPBI-xPI-COOH composite membranes (x represents the weight percentage of PI-COOH in the entire membrane) deliver high proton conductivities and superior PA retention due to the continuous hydrogen bond network between OPBI and PI-COOH. The OPBI-50PI-COOH composite membrane revealed a proton conductivity of 89 mS cm−1 under low PA uptake (109%). Compared to the linear OPBI and OPBI-40PI composite membrane, a single cell with a low PA-doped OPBI-50PI-COOH composite membrane presented superior durability and power density (463 mW cm−2) at 160 °C and 0% relative humidity. In a short-term durability test of 369 h, the voltage attenuation rate was only 119 μV h−1. These outstanding outcomes indicate that the obtained acid-base composite membranes can be considered as capable candidates for HT-PEMs with enhanced performance.
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高影响因子
POLYMER
·
2022
·
IF 4.432
Min Zhao,Caili Zhang,Yunxuan Weng,Pei Li
Thermal oxidative crosslinking results in the generation of oxygen bridges among polymer chains and helps regulate the membrane microstructure. Simultaneously, any strategy to increase the crosslinking sites of polyimide (PI) can improve the crosslinking efficiency and allow precise control of the pore structure of membranes. Phenolphthalein-based PIs are potentially suitable precursors for thermal oxidative crosslinking of membranes, since thermal treatment will result in the degradation of lactone ring leading to the generation of a pair of phenyl crosslinking sites. In this work, three phenolphthalein-based diamines with different structures were designed and synthesized. The three diamines were subsequently reacted with 3,3′,4,4′-benzophenone tetracarboxylic dianhydride (BTDA) to prepare phenolphthalein-based PIs. The original membranes were post-treated by thermal oxidation crosslinking at 400 °C and 425 °C, respectively; the lactone ring underwent decomposition, and the imide ring opened at the same time, resulting in the generation of multiple crosslinking sites and correspondingly improving the crosslinking efficiency. The effect of the side groups (−CH 3 , –CF 3 or unsubstituted) of phenolphthalein-based diamine and thermal treatment temperatures on the gas separation performance of phenolphthalein-based PI membranes were investigated. Wide-angle X-ray diffractometry (WAXD) and wide-angle X-ray scattering (WAXS) analysis demonstrated that the π-π stacking distance were improved. BTDA-FPP-425 had a CO 2 /CH 4 selectivity of 37.68. This thermal degradation along with thermal oxidative crosslinking strategy provides a promising approach for fabrication of CO 2 /CH 4 separation membrane .
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 38
·14255-14264
·
IF 8.067
Xiaofei Li,Xin Ding,Yuhang Du,Chao Xiao,Yanyan Wang,Kang Zheng,Xianglan Liu,Lin Chen,Xingyou Tian,Xian Zhang
Photothermal actuators have received more and more attention due to their high efficiency, easy fabrication, and various implementation methods. In this work, we prepared a photothermal actuator via structural design using liquid metal (LM) particles and polyimide. Due to the flexibility of liquid metals, which is different from those of other rigid fillers, the photothermal actuator responds rapidly with a bending speed of 21.89° s−1, which exceeds those of most of the reported photothermal actuators. In addition, this work explored the photoactuation mechanism of the liquid metal/polyimide photothermal actuator and found that the difference in the thermal expansion coefficient was the main reason for the liquid metal content to be low. What's more, the photothermal actuator can mimic the creeping of caterpillars, the swimming of fish, and the lifting and falling of arms under a NIR laser. Besides, the photoactuators can be used as light-controlled switches to realize the remote and precise control of the circuit. Therefore, photoactuators are expected to be used in the fields of bionic systems and flexible robots, which enriches the research content of photoactuators and expands the application field of liquid metals.
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高影响因子
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